Re: [PATCH] Hexagon (target/hexagon) Add overrides for count trailing zeros/ones

[Richard Henderson]

On 4/5/23 09:42, Taylor Simpson wrote:
> The following instructions are overriden
>      S2_ct0            Count trailing zeros
>      S2_ct1            Count trailing ones
>      S2_ct0p           Count trailing zeros (register pair)
>      S2_ct1p           Count trailing ones (register pair)
>
> These instructions are not handled by idef-parser because the
> imported semantics uses bit-reverse.  However, they are
> straightforward to implement in TCG with tcg_gen_ctzi_*
>
> Test cases added to tests/tcg/hexagon/misc.c
>
> Signed-off-by: Taylor Simpson<tsimpson@quicinc.com>
> ---
>   target/hexagon/gen_tcg.h | 24 +++++++++++++++++
>   tests/tcg/hexagon/misc.c | 56 +++++++++++++++++++++++++++++++++++++++-
>   2 files changed, 79 insertions(+), 1 deletion(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~